Pressure gauge



M. KLEIN PRES SURE GAUGE May 28, 1935.

Filed Sept. 27, 1932 Patented May 28, 1 935 I UNITED STATES PATENT oFrcE PRESSURE GAUGE Maximilian Klein, Sellersville, Pa, assignor toUnited States Gauge Company, Sellersville, Pa., a corporation ofPennsylvania Application September 27, 1932, Serial No. 635,103

6 Claims. (01. 73-109) This invention relates to pressure gauges,partact with the said p by the e s that ticularly of the Bourdon type,and aims to procures the bracket to the socket .megnber, and in vide agauge construction of great simplicity, which the dial is then securedto the means that manufactured of parts that may be produced at servesthe function of spacing thedial from the a low cost, and assembled withgreat facility bracket and securing the bracket to the socket 5 in sucha way as to provide a firm support for member. all of the parts thatenter into its construction. Still further objects of the invention willap- Another object of the invention is to provide pear as a descriptionthereof proceeds with refa gauge construction in which the socketmemerence to the accompanying drawing, in which 1 ber, that servestoconnect the gauge to the sys- Figure 1 is a front elevational view of agauge tem in which it is intended to give an indication constructed inaccordance with the present inof the existing pressure, is formed of barstock" vention. t that is initially rectangular in cross section and'Figure 2 is a rear view of the socket member, that is brought into theform desired by simple the bracket that supports the moving parts ofmachining operations, the fiat surfaces of the the instrument, and thedial as seen from the 15 bar stock being utilized to provide stablesupports rear of the dial. for the various parts assembled about saidsocket Figure 3 is a vertical sectional view taken on member, thusfacilitating the assembly of the the plane indicated by 1311811116 ofFigure gauge and contributing to the rigidity of the as- Figure 4 is aside elevational view of the socket v sembled construction. member. 20

A further object of the invention is to provide Figure 5 is a sectionalview taken on the plane a simplified way of assembling the socket thatindicated by the line 5- -5 in Figure 4, looking in carries the movingparts of the gauge with rethe direction of the arrows. spect to thesocket member, and of securing the Like reference characters indicatelike parts dial of the gauge to the socket member indethroughout theseveral figures. pendently of the bracket just referred to. The gauge ofthe present inventionis construct- Still another object of the inventionis to proed about a socket member H),- which, as indicated videapressuregauge that includesasocket memin Figure 5 of the drawings, is formed ofbar ber formed to present a pair of parallel flat sufstock ofrectangular, preferably square cross-secfaces, one of which is utilizedto receive a parttion, said stock being used because a socket mem- 30 ofthe bracket, supporting the moving parts of ber can be readily formedtherefrom by ordinary the gauge, and the other of which is utilized tomachining operations. In order to accomplish attach the back of thecasing that houses said this the bar stock is cut to the desired lengthmoving parts of the instrument. and oneend thereof is provided withthreads A still further object of the invention is to H, permitting thesocket member to be screwed 35 provide a pressure gauge in which thedial and into engagement with an internally threaded a part of thebracket that supports the moving socket formed as a part of the systemor ap aparts of the instrument are arranged in juxtaratus in which thegauge is to be applied. position and secured to the same side of the Akerf I2 is formed in the socket member on 40 socket member of the gauge,but in which the one of the fiat sides thereof, said kerf being pro- 40securing of the dial is accomplished in a manvided to receive the end ofthe Bourdon tube of ner independently of the bracket so that the thegauge in a manner hereinafter described. dial and bracket may beseparately attached to The socket member is further provided with a pthe socket member. further groove I3 formed from the end of the 5 Thisinvention also aims to provide a simplisocket member, opposite to thatwhich is threadfied way of assembling the dial and bracket suped, suchbeing provided to furnish clearance for porting the moving parts of thegauge with rethe movingparts of the gauge. Thesocket memspect to thesocket member thereof, by utilizing ber is further provided with a borel4 extending a bushing to secure the bracket to the socket centrallylongitudinally-thereof to kerf' l2 before and by then securing the dialto the'bushing by. referred to, such bore serving to put the Bourdon 5Ofastening means that is engaged therewith. tube in communication withthe fluid, the pres- Still another object of the invention is to prosureof which is to be measured. Said socket vide a gauge in which the dialis spaced from member is further provided with tapped openthe bracketthat supports the moving parts of ings l5 and I6, formed from one of theflat sides the instrument and thus maintained free of conthereof, suchopenings being provided for the re- 55 ception of fasteners, provided tosecure the casing to the socket member in a manner hereinafterdescribed. The socket member is further provided with an opening I!formed from the side thereof opposite to that from which the openings l5and I6 are formed, said opening ii being provided to receive the meansthat fastens the bracket that supports the moving part of the gauge tothe socket member. It will be readily understood that the socket memberso far described may be conveniently and cheaply produced from bar stockby performing simple machining operations upon stock out to the desiredlengths.

All of the parts of the gauge are secured to'said socket member.

The moving parts ofthe gauge are secured in a bracket consisting of apair of L-shaped bars l8 and i9 that are secured together in spacedrelation, as by means of hollow rivets 28 or the like, that pass throughsleeves that space the members i8 and i9 apart, or in any other approvedmanner. The part l8 of the bracket is provided with a downwardlyextending part 2| constituting a part of the bracket that, when thegauge is in assembled condition, rests against a flat side of the socketmember I 8 in lapped relation to said side as illustrated in Figure 3.

An arbor 22, having reduced portions journalled m the bars l8 and I9,extends beyond the bar i 8 and carries a pointer 23 that is securedof apin 2| to an eye 32 rigidly secured in any approved manner to the closedend of a preferably flat, Bourdon tube 33 that is preferably curvedaround the moving parts of the gauge and secured at its opposite end inthe recess or kerf I2 of the socket member "I, as by soldering or thelike, the connection being made in such manner that the interior of thetube is open to the bore l4 extending partially through said member. Alight coiled spring 34, coiled about the arbor 22 having one end securedto said arbor and its other end preferably secured around the adjacentspacing sleeve, through which the ad'- jacent rivet 28 passes, serves tobias the pointer 33 carried by the arbor toward the zero position of ascale 35 of a dial 36 over which the pointer moves. A stop pin 31attached to said dial, at the zeroposition of the scale, serves to stopthe movement of the pointer under the influence of the spring 34 in amanner well under:

stood in the art.

' While one type of supporting bracket, and arrangement of moving partsin said bracket, has

just been described, it should be understood that brackets of otherforms and working parts differently arranged may be utilized since thepresber of the novel form above described.

In the operation of the moving parts just described, it will be readilyunderstood that, when fluid under pressure enters the Bourdon tube 33,the end thereof carrying the eye 32 moves outwardly rocking the sectorgear 26 upon its pivotal mounting 21. Sector gear 26 actuates the gear25 and causes the arbor 22 to be rotated about its axis carrying with itthe pointer 23 which is caused to move over the scale 35 in oppositionto the spring 34.

The part 2| of the bracket, in which the moving parts of the gauge aresecured, is secured to socket member H) by means of a bushing 38 havinga head 39 preferably of annular form contacting with the outer face ofthe part Zlof the bracket, as illustrated in Figure 3. The bushing 38 isdriven in the opening I! in socket member before referred to, and may besecured in said opening in any desired manner. When in position it willbe understood that the bracket, carrying the moving parts of the gauge,is secured to the socket member by said bushing, thus assembling saidmoving parts with respect to said socket member in an extremely simplemanner.

The Bourdon tube 33, which is secured in the kerf i2 in the socketmember is connected to the link 29 after the bracket supporting themoving parts is secured to the post as just stated, thus speeding theassembly of the tube, socket member and moving parts.

The dial 38 may then be assembled independently of the bracket thatsupports the moving parts of the gauge by passing the enlarged opening40 over the outwardly projecting portion of the arbor 22, and bysecuring said dial to the bushing 38 by means of a screw 4i threaded ina tapped opening 42 in said bushing. If desired, rivets may be used inplace of the screw illustrated in the drawings, or drive screws of theKalon-Parker type may be applied as will be obvious to persons skilledin the art.

It will be observed that when the dial is secured as just described, thehead 39 of the bushing 38 serves to space the body of the dial from thepart 2| of the bracket so that the dial will clear any projections fromsaid bracket, as for example those caused by the rivets 20, which mayproject somewhat beyond the outer surface of the bracket.

After the bracket that supports the moving parts of the gauge and thedial have been secured to the socket member, said member is applied to acasing 43 of cup-shaped formation having an opening 44 in the sidethereof. The assembly is inserted in the casing by tilting the same andentering the socket member ID in the opening 44.

As the socket member passes through said opening the assembly may becompletely inserted within the casing until the rear fiat side of thesocket member rests against the back of the casing. The assembly is heldin fixed relation in the casing by means of screws 45 that pass throughopenings in the rear wallof the casing, and that are threaded in theopenings l5 and I6 of the socket member before referred to.

It will beunderstood that in view 01' the fact that the socket memberpresents a flat surface of relatively large area to the back of thecasing, that the assembly or the socket member, bracket for securing themoving parts of the gauge, and dial are fixedly secured within thecasing upon application of the screws 45 to the socket member. The openside of the casing 43 is then closed by means of a crystal 46, disposedwithin a bezel 41,

that is attached to the casing 43 in any approved manner as by means ofa screw passing through a flange of the bezel and the side of the case.

The arrangement just described may be manufactured at low cost andassembled with great expedition in view of the flat surfaces ofrelatively large area presented by the socket member to the casing andto the part of the bracket secured thereagainst. Adequate support isthus presented for the parts. The dial is secured to the socket memberindependently of the bracket supporting the moving parts together, anduse is made of the fastening means for securing the bracket to thesocket member to space the dial from the bracket so that any incidentalprojections therefrom will not interfere with the disposition of thedial so that its face is disposed V in a plane at right angles to theaxis of rotation of the pointers moving thereover.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiment is therefore to be considered in all respects as illustrativeand not restrictive, the scope of the invention being indicated by theappended claims rather than by the foregoing description, and allchanges which come within the meaning and range of equivalency of theclaims are therefore intended to be embraced therein.

What I claim as my invention is:-

1. A pressure gauge comprising a socket member, a bracket supporting themoving parts of said gauge having a part lapping one side of saidmember, a fastening element securing said part to said member, a dial,and means to secure said dial to said fastening element.

2. A pressure gauge comprising a socket member, a bracket supporting themoving parts of said gauge having a part lapping one side of saidmember, a bushing securing said part to said member, a dial, andfastening means securing said dial to said bushing independently of saidbracket part.

1 3. A pressure gauge comprising a socket memher, a bracket supportingthe moving parts of said gauge having a part lapping said member, a

bushing having a head formed to act as a spacer securing said bracketpart to said member, a dial disposed against said spacer, and means tosecure said dial to said bushing independently of said bracket part.

4. A pressure gauge comprising a socket mem ber, a bracket forsupporting the moving parts of the gauge, a dial, common means forsecuring said bracket to said inember and for spacing said dial fromsaid bracket member and means for securing said dial to said commonmeans.

5. A pressure gauge comprising a socket member, a bracket for supportingthe moving parts of the gauge, a dial, friction means engagingsaidbracket and said member for securing said bracket and said membertogether and including a spacing means and screw threaded means forsecuring said dial to said friction means.

6. A pressure gauge comprising a socket member constructed from a pieceof flat stock being threaded to permit-application of the member to athreaded opening, a Bourdon tube supported in a recess cut in one sideof the stock, a bore through said threaded end of the socket member incommunication with said tube, a bracket sup- MAJHMIIJANKIEHW.

